/* Auth Container */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to bottom, var(--color-neutral-50), var(--color-white));
    /* Optical centering with padding instead of transform */
    padding: var(--space-4) var(--space-4) calc(var(--space-4) + 5vh) var(--space-4);
    box-sizing: border-box;
}

/* Auth Card */
.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-white);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    padding: var(--space-8);
}

/* Auth Header */
.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.auth-subtitle {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* Auth Form */
.auth-form .form-group {
    margin-bottom: var(--space-6);
}

.auth-form .form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.auth-form .input-wrapper {
    position: relative;
}

.auth-form .form-input {
    width: 100%;
    height: 3rem;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--input-border-radius);
    background: var(--color-white);
    color: var(--color-text-primary);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.auth-form .form-input:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.auth-form .form-help {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-2);
}

/* Auth Button */
.auth-form .btn-block {
    width: 100%;
    height: 3rem;
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    margin-top: var(--space-2);
}

.btn-text {
    transition: opacity 0.2s ease;
}

.btn-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-white);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.btn.loading .btn-text {
    opacity: 0;
}

.btn.loading .btn-loader {
    opacity: 1;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Auth Message */
.auth-message {
    margin-top: var(--space-4);
    padding: var(--space-4);
    border-radius: 8px;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    min-height: 1.25rem;
    visibility: hidden;
}

.auth-message.error {
    background: #FEF2F2;
    color: var(--color-status-danger-600);
    border: 1px solid #FEE2E2;
}

.auth-message.success {
    background: #F0FDF4;
    color: var(--color-status-success-600);
    border: 1px solid #DCFCE7;
}

/* Auth Status */
.auth-status {
    text-align: center;
    margin-top: var(--space-8);
}

.auth-status .auth-message {
    margin-bottom: var(--space-4);
}

.auth-status .btn {
    margin: 0 auto;
}